Lexar NM790 512GB Gen4 M.2 vs Lexar TouchLock 1TB NFC Portable (2026): Key Differences
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When you compare the lexar nm790 512gb gen4 m 2 vs touchlock 1tb nfc portable, you see two distinct storage solutions from the same brand. Both devices prioritize speed and reliability for their specific use cases. The primary difference lies in their form factor and connectivity. The NM790 is an internal drive designed for direct motherboard installation, while the TouchLock is an external portable unit. You must choose based on whether you need to upgrade a computer's internal storage or carry data externally with added security features.
Key differences
| Aspect | Lexar NM790 512GB Gen4 M.2 SSD | Lexar TouchLock 1TB NFC Portable SSD |
|---|---|---|
| Storage Capacity | 512GB | 1TB |
| Interface | PCIe Gen4 NVMe | USB 3.2 Gen 2 |
| Form Factor | M.2 2280 Internal | Portable External SSD |
| Cache Type | Host Memory Buffer (HMB) 3.0 | not listed |
| Security | not listed | 128-bit AES hardware encryption with NFC |
| Max Read Speed | 7200 MB/s | not listed |
Which one should you choose?
Choose Lexar NM790 512GB Gen4 M.2 SSD if
- You need to upgrade the internal storage of a desktop or laptop.
- You want maximum sequential read and write speeds for gaming or content creation.
- You are building or upgrading a PlayStation 5 console.
Choose Lexar TouchLock 1TB NFC Portable SSD if
- You require portable storage that you can carry between devices.
- You need hardware-level encryption and one-touch NFC authentication for security.
- You prefer a larger 1TB capacity in a compact, magnetic external form factor.
Verdict: The NM790 is the better choice for users who need high-speed internal storage for gaming or professional workloads. The TouchLock suits those who need secure, portable external storage with convenient NFC unlocking. Your decision depends entirely on whether you are installing a drive or carrying one.
Lexar NM790 vs TouchLock Specs
Interface and Speed
The Lexar NM790 uses a PCIe Gen4 NVMe interface, delivering up to 7200 MB/s read and 4400 MB/s write speeds. This makes it two times faster than PCIe Gen3 SSDs. The Lexar TouchLock relies on a USB 3.2 Gen 2 connection for external use. While the exact transfer speeds for the TouchLock are not listed in the provided data, its controller is updated for reliability. The NM790 offers significantly higher theoretical bandwidth due to its direct motherboard connection. You will notice this speed difference when moving large files or loading games directly from the drive.
Form Factor and Size
These drives serve completely different physical roles. The NM790 is an internal M.2 2280 single-sided SSD, designed to fit directly into laptops or desktop motherboards. It is compact and black. The TouchLock is an external portable SSD with dimensions of 3.37 inches in length, 2.09 inches in width, and 0.28 inches in height. It features a slim profile and includes magnetic backing to attach to an iPhone. You choose the NM790 for internal storage expansion and the TouchLock for portable, external data transport.
Storage Capacity
Capacity is a major differentiator between these two models. The Lexar NM790 is available in a 512GB configuration. This is sufficient for a primary operating system drive or a few large games. The Lexar TouchLock offers 1TB of storage. This double the capacity makes it better suited for storing large media libraries, backups, or extensive project files. If you need more space for your data, the TouchLock provides a larger pool. The NM790 is limited to the 512GB option in this comparison.
Security Features
The Lexar TouchLock includes dedicated hardware security features. It uses 128-bit AES hardware encryption and supports one-touch unlocking via NFC authentication using a mobile device. The drive will not be recognized if not unlocked first, ensuring data protection. The NM790 does not list specific hardware encryption or NFC capabilities in its specifications. It relies on Host Memory Buffer (HMB) 3.0 for performance rather than security. If data privacy and physical access control are priorities, the TouchLock offers robust built-in solutions.
Cache and Power
The NM790 utilizes Host Memory Buffer (HMB) 3.0 technology. This activates your device's DRAM cache function to provide smoother transfer speeds without requiring a dedicated DRAM chip on the drive itself. It also claims up to 40% less power consumption than DRAM cache-enabled PCIe Gen4 SSDs. The TouchLock specifications do not detail its caching mechanism or power efficiency metrics. The NM790 is optimized for efficient internal performance, while the TouchLock focuses on external reliability with its in-house controller.
Durability and Build
The Lexar TouchLock is rated for 2-meter drop protection, making it suitable for rugged, on-the-go use. Its magnetic design and slim profile add to its physical resilience and convenience. The NM790 is a single-sided internal drive designed for laptops and PS5 compatibility. While durable for internal use, it lacks the specific drop-protection rating listed for the portable model. The TouchLock is built to withstand external handling, whereas the NM790 is built for stable internal operation.
Choose based on your storage needs
PS5 gamers needing fast internal storage
The NM790 fits the PS5 expansion slot. It delivers 7200 MB/s reads, ensuring quick load times. The M.2 2280 form factor allows direct installation. You get high performance without bulky external cables. This drive is designed for seamless integration into your console.
Users needing portable encrypted external storage
The TouchLock offers 1TB of external capacity. It uses USB 3.2 Gen 2 for reliable connectivity. NFC authentication adds a layer of security. The slim design attaches to devices via magnet. You get portable protection for your data with hardware encryption built into the drive.
Laptop owners seeking efficient internal drive
This single-sided SSD fits easily in laptops. It uses less power than DRAM cache-enabled drives. The Host Memory Buffer helps maintain smooth transfers. You gain speed and efficiency in a compact form. It is an ideal upgrade for internal storage expansion in portable computers.
The products compared
Lexar NM790 512GB Gen4 M.2 SSD
Best for: internal PC and PlayStation 5 storage expansion
- Storage Capacity
- 512GB
- Interface
- PCIe Gen4 NVMe
- Form Factor
- M.2 2280
- Max Read Speed
- 7200 MB/s
- Max Write Speed
- 4400 MB/s
- Cache Type
- Host Memory Buffer (HMB) 3.0
View on Amazon: Lexar NM790 512GB Gen4 M.2 SSD Affiliate link
The Lexar NM790 is an internal M.2 2280 NVMe solid-state drive operating on the PCIe 4.0 interface. It delivers sequential read speeds up to 7200 MB/s and write speeds up to 4400 MB/s using Host Memory Buffer 3.0 technology. This 512GB drive suits you if you need fast internal storage for a laptop, desktop PC, or PlayStation 5 console.
Pros
- Read speeds up to 7200 MB/s and write speeds up to 4400 MB/s
- Compatible with PlayStation 5 and single-sided laptop slots
- 500TBW endurance rating backed by a five-year limited warranty
- Host Memory Buffer 3.0 design reduces power consumption
Cons
- 512GB capacity provides less space than 1TB alternatives
- Uses Host Memory Buffer instead of dedicated onboard DRAM cache
- Internal M.2 form factor provides no external plug-and-play use
Good fit if
- You need high-speed PCIe 4.0 internal storage for a PC or PlayStation 5.
- You want a slim, single-sided M.2 drive for a compact laptop expansion slot.
Skip if
- You need portable external storage with plug-and-play USB connectivity.
- You require 1TB or more capacity for large game libraries and media archives.
Verdict: Lexar NM790 512GB Gen4 M.2 SSD delivers high PCIe 4.0 transfer speeds for desktop, laptop, or PS5 internal expansion. It suits builders and gamers seeking fast local drive performance in a 512GB footprint.
Lexar TouchLock 1TB NFC Portable SSD
Best for: secure mobile storage with NFC
- Storage Capacity
- 1TB
- Interface
- USB 3.2 Gen 2
- Form Factor
- Portable SSD
- Dimensions
- 3.37 × 2.09 × 0.28 inches
View on Amazon: Lexar TouchLock 1TB NFC Portable SSD Affiliate link
This Lexar TouchLock is a 1TB portable SSD with a slim, magnetic profile. It connects via USB 3.2 Gen 2 and uses NFC for one-touch unlocking. The drive includes 128-bit AES hardware encryption and a Lexar App for automatic backups. It is rated for 2-meter drop protection. You should choose this if you need secure, external storage for mobile devices rather than internal expansion.
Pros
- 1TB storage capacity
- One-touch NFC unlocking
- 128-bit AES hardware encryption
- Magnetic attachment for phones
- 2-meter drop protection rating
Cons
- External portable form factor, not internal M.2
- Requires unlocking to function
- No internal PCIe Gen4 interface
Good fit if
- You need secure external storage for a smartphone
- You want one-touch NFC authentication
- You require 128-bit hardware encryption
Skip if
- You need an internal M.2 drive for a PC
- You want a PCIe Gen4 interface
- You do not want to use an app for unlocking
Verdict: Lexar TouchLock 1TB Portable SSD is a secure external drive for mobile users. It fits those who prioritize NFC authentication and magnetic mounting over internal speed.
Specifications side by side
| Spec | Lexar NM790 512GB Gen4 M.2 SSD | Lexar TouchLock 1TB NFC Portable SSD |
|---|---|---|
| Storage Capacity | 512GB | 1TB |
| Interface | PCIe Gen4 NVMe | USB 3.2 Gen 2 |
| Form Factor | M.2 2280 | Portable SSD |
| Max Read Speed | 7200 MB/s | not stated |
| Max Write Speed | 4400 MB/s | not stated |
| Cache Type | Host Memory Buffer (HMB) 3.0 | not stated |
| Compatibility | PS5 | not stated |
| Size | 512GB | 1TB |
| Dimensions | not stated | 3.37 × 2.09 × 0.28 inches |
| Color | Black | not stated |
| Model | LNM790X512G-RNNNU | 0843367143399 |
Frequently asked questions
Can I use the Lexar NM790 as a portable external drive?
The NM790 is an internal M.2 2280 SSD, not a portable external drive. It connects directly to a motherboard via PCIe 4.0. You need an enclosure to use it externally. The TouchLock 1TB is designed specifically for portable use with NFC authentication and magnetic mounting.
Does the TouchLock support PS5 expansion?
The TouchLock 1TB is a portable external SSD, so it does not fit inside a PS5 expansion slot. The NM790 is explicitly compatible with PS5. Its M.2 2280 form factor allows direct internal installation for high-speed game loading on the console.
Which drive has more storage capacity?
The Lexar TouchLock 1TB offers double the storage of the NM790. The TouchLock provides 1TB of space. The NM790 comes in a 512GB size. You choose the TouchLock if you need larger capacity for files and media on the go.
How do I secure the Lexar TouchLock?
The TouchLock uses NFC authentication to secure your data. You can unlock it quickly using compatible smartphones or devices. This feature adds a layer of security for mobile users. The NM790 does not mention any built-in authentication or security features.
What is the physical size difference between the two?
The NM790 is an M.2 2280 stick, which is thin and flat. The TouchLock is a rectangular portable drive measuring 3.37 inches in length and 2.09 inches in width. The TouchLock is thicker at 0.28 inches and includes a magnetic back for mounting.
Is the NM790 suitable for laptops?
Yes, the NM790 is ideal for laptops. It features a compact M.2 2280 form factor that fits most modern laptops. The PCIe 4.0 interface provides fast internal storage speeds. This makes it a good upgrade for improving laptop performance and load times.
Can I mount the TouchLock to my desk?
The TouchLock is designed with magnetic mounting capabilities. You can attach it to metal surfaces for easy access. This feature supports its role as a secure mobile storage solution. The NM790 has no mounting options as it is an internal component.